oh, hang glider, just before? yeah, it's even designed to bring back the gemini. and they said it wouldn't work. but somebody said, "well, hey, what about the--" how soon before, paul? about three years--four years. let me correct that. you know, gang, the hang glider-- [laughing] thanks, paul. you know, paul casey is a science writer, you know, and he's taking our class? he writes--he makes his living writing science articles. anyway, anyway, gang-- is this, gang, we have to be patient of where we are in our history. everything doesn't happen at once. we're still growing, you know? now, with this fusion, how come we don't have fusion power plants? it's too hard to take these things and push them together. it's enormous electrical repulsion. if you'd heat this stuff up to a gas, maybe above a hundred million degrees, these things will be fast-- going fast enough, they'll scrunch. how does the sun and the stars do it? brute force, gravity. [makes sound] i say, "i don't care electrical repulsion, no electrical repulsion." wham. right in. and the sun and the stars is just brute force these things together, and you get your fusion. now, how do we get that-- how do we do that in earth?